
SimradSH90
Preventivemaintenanceschedule
TheSimradSH90isastateoftheartsonarsystemwithonlya
minimumofmovingparts.Atthesametime,thesonarsystem
hardlyprovidesanyuserserviceableparts.Inordertosecure
thesystemforlongandtrouble-freeuse,observethefollowing
preventivemaintenancetasks.
Regularormonthlybasis
Observethefollowingtaskstobecarriedoutonaregularbasis,
andatleasteverymonth.
1Cleanthescreenonthecolourdisplay.
→Displaycleaningonpage190
2Checktheambienttemperatureandthehumidityinthe
sonarroom.
→Ambienttemperatureandhumidityonpage191
3CleantheTransceiverUnit.
→TransceiverUnitcleaningonpage191
4CleanthePowerSupplyUnit.
→PowerSupplyUnitcleaningonpage193
5CheckthattheTransceiverUnitisdry,andnotexposedto
excessivedustorvibrations.
→TransceiverUnitcleaningonpage191
6Inspectthehullunittocheckforwaterpenetrationdueto
lackoflubricant.Lubricateifrequired.
→Hullunitlubricationonpage207
Everythreemonths
Observethefollowingtaskstobecarriedouteverythreemonths.
1CleantheProcessorUnitsurfaces.
→ProcessorUnitcleaningonpage190.
2CleantheOperatingPanelsurfaces.
→OperatingPanelcleaningonpage190
3IfyouhaveaHeatExchangeronyourTransceiverUnit,
cleanitsinternalltersandfans.
→TransceiverUnitHeatExchangeronpage192
188
323775/B
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